'Do you think Sir Charles was murdered by a friend?' I asked.
'I think he knew his murderer,' replied Holmes. 'And I think his murderer is not far away.'
After dinner, we sat in the library. There were paintings of the Baskerville family hanging on the walls. Some of the paintings were very old.
Sherlock Holmes looked at the paintings carefully. He was interested in the painting of Sir Hugo Baskerville, dated 1645.
Interesting, Watson, very interesting,' said Holmes. 'Here is a painting of Sir Hugo, the man who started the story of the Hound of the Baskerville. I am able to remember faces. Look at this black beard and the face. Have you seen this face before?'
'Yes, Holmes,' I said. 'It is the face of the man we saw in London. It is the man who followed Sir Henry in a cab!'